Magnetic clutch.



PATENTED NOV. l0, 1903.

C. .TENATZY, FILS.

MAGNETIC CLUTCH.

APPLIUATION FILED JUNE 27, 1903.

N0 MODEL.

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atented November `10, 1903i.

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CAMILLE JENATZY, FILS, OF BRUSSELS, BELGIUM.

MAGNETIC CLUTCH.

SPECIFICATION forming part of Letters Patent N o. 743,514, dated November 10, 1903.

Application led June 2'7. 1903. Serial No. 163.309. (No model.)

To @ZZ whom t 11m/y concern.-

Beit known that I, CAMILLE J ENATZY, Fils, engineer,a subject of the King of the Belgians, residing at 222 Rue du Progrs, Brussels, in the Kingdom of Belgium, have invented certain new and useful Improvements in Magnetic Clutches; and I do hereby declare the following to be a full,clear, and exact description ot' the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

fThis invention relates to a novel magnetic clutch in which the prejudicial eect of the inertia of the clutch-plate during the speedi changing operation is absolutely obviated, while at the same time far more gradual starting is rendered possible.` With this object the ily-wheel of the clutch remains exactly the same as in my patent dated July 7, 1903,

No. 732,943, but with the interposition of antifriction metal cast between the concentric rings F to the level of the rings themselves in order to prevent during sliding the gripping of the driving-plate.

In the accompanying drawings, Figure 1 is a longitudinal section of the apparatus, and

Fig. 2 is an end View of portion of the appa-4 magnetic field, is mounted by the intermediary of elastic arms M upon asleeve M', rotating with easy friction or in anyother suitable manner upon the sleeve M, provided with a square hole.

The auxiliary plate J by the intermediary of its elastic arms is arranged in such a manner that the said plate when released remains automatically at a longitudinal distance of one-half millimeter from the driving-plate J',

owing to the elastic action ot its arms. The Vposition of the sleeve M in the longitudinal direction is limited `by stops M, provided on the sleeve M. Assuming, as shown in Fig. l, that disengagement has been completely eected-that l is tosay, that the pedal is at the extremity of its stroke-the driving-plate separated from the fly-wheel and also automatically separated from the auxiliary plate owing to the elasticity of the arms MH of this latter, it the pedal is permitted to return, the driving-plate, owing to the spring U, will come into contact with the lips of the fly-wheel, and at thismoment the auxiliary plate will have followed it in its travel, while still leaving between the two the interval of one-half millimeter or such other interval as may be considered most suitable. The continuation of the retrograde `movement of the pedalwill close the circuit with all the resistances of the rheostat interposed. At this moment, owing to the small strength of the field established and to the insufflcient section of the driving-plate, starting will be eiected with a large amount of slipping, and consequently Verygradually. The continuation of the retrograde movement of the pedal will correspond with the successive short-circuiting of the resistances still interposed. In the course of this short-circuiting and at the moment at which the eld attains `a sufficient value for overcoming the elasticity of the arms ot the auxiliary plate J" this latter will by attraction become applied against the driving-plate J', and will thus complete the magnetic section indispensable for the total driving. It then only remains to permit the pedal acted upon by the spring Vto complete its retrograde movement, thus causing the short-circuiting ot all the resistances, and consequently complete engagement.

In the case of a change of speed the driver will begin by pressing upon the pedal to interrupt the current. At this moment the auxiliary plate J" under the influence of the elasticity of its arms will separate from the driving-plate J' by the amount provided for at the time of mounting the mechanism, and owing to the fact that it is independent upon the sleeve M its inertia will no longer exercise any eiect upon the driving-plate, and

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owing to the extreme lightness of this latter the change of speed Will be produced under the most favorable conditions.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that WhatI claim isl. In a magnetic clutch a magnetic fly-l wheel provided with a friction-surface constituted by the combination of antifriction metal and steel for preventing gripping ofthe plates during sliding action and heating of the parts in frictional contact.

2. In a magnetic clutch, adriving-plate hollowed out to the fullest extent land of which the circularly solid or continuous portions are netic ily-wheel, the drivingplate being rigid with the clutch-sleeve and consequently with of any kind.

3. In a magnetic clutch an auxiliary plate,

' the elasticity of its arm, at a given distance so that the fuis viva of the auxiliary plate no longer affects the driving-plate.

4. In a magnetic clutch, an auxiliary plate automatically separable from the drivingplate, whereby the latter is freed from the iniluences of the @is @im of said auxiliary plate jduring the disengaging operation. superposed upon the steel lips of the magf In testimony that I claim the foregoing as Imyinvention I have signed my name in presence of two subscribing witnesses.

the speed-change shaft or any other transi mission part of a vehicle or of a mechanism 1 CAMILLE J ENATZY, FILS. Witnesses:

GREGORY PHELAN, MAURICE GERBEAULT. 

